Datagram Transport Layer Security (DTLS) is now more popular than UDP for a variety of applications. The SilverCreek SNMP Test Suite is no longer limited to UDP, so you can use SilverCreek to test your full implementation over your preferred transport protocol…

Karl Auerbach, Chief Technical Officer at IWL, will deliver one of the keynote addresses at the North American Network Operator’s Group (NANOG 77):

“As the Internet becomes a public utility, what is the impact on network operators?” …

IWL CTO Karl Auerbach reflects on the software industry’s evasion of liability. The US government has indicated a requirement to shift liability for insecure software products and services in the newly released National Cybersecurity Strategy…

The newest Mac Minis with 10 G network interface cards have a problem when operating at 2.5 G. After several tests it became clear that the bursts of loss occurred only when the Mac Mini was running its copper network interface at 2.5Gbits/second. And only with Zoom …

How are you measuring your network’s performance? One can have a very fast network, but get very little throughput, with very high perceived delays…If you are using a tool, such as iperf, to measure throughput, the results can be quite deceptive. That's because iperf displays effective throughput of data at the transport layer, and thus masks what is actually going on underneath …

IWL Products are NOT Affected by Log4j Vulnerability, disclosed by Apache. Log4j allows attackers to execute code remotely on a target computer, meaning that they can steal data, install malware or take control …

On December 4th, the President of the U.S. signed the IoT Cybersecurity Improvement Act of 2020, which directs the National Institute of Standards and Technology (NIST) to create standards and guidelines on the use and management of internet of things devices by federal agencies and to develop guidance on vulnerability disclosure and the resolution of disclosed vulnerabilities…

ICS-CERT (Industrial Control System – Computer Emergency Response Team) is part of the U.S. Department of Homeland Security. Recently CERT issued two Advisories concerning TCP/IP implementation flaws that have existed for years, perhaps decades and are now being found in embedded systems …

"T-Mobile can keep telling consumers that its 5G service is faster than 4G and offers more coverage than rivals' 5G, but the National Advertising Division (NAD) of BBB National Programs recommends that it stop claims that its 5G network is more reliable than competitors’ 4G or 5G networks." …

Many "Speed Test" tools available on the Internet are easily run in a web browser. Should you trust those tools?

Not really. The popular speed testing tools provide a very narrow and limited measure of network "speed". It is quite possible that a network that is rated as "fast" could actually deliver poor results to many applications …

A SonicWall user recently came to us for help; the user felt the problem was within SIP and UDP. Here are some thoughts and ideas we provided to help him with his SIP diagnosis.

SIP is a somewhat troublesome protocol. The basic SIP transactions flow with a well known UDP port number. That makes it relatively easy for a firewall to allow (or disallow) the SIP protocol itself …

We read Damien Garros' blog post -- Introduction to Network Emulation and Requirements for Virtual Network Devices with great interest as Mr. Garros takes an unusual view of networking. Our thoughts and comments follow …